|Title:||Effectiveness of using Polyethylene and 5% Borated Polyethylene for Radiation Shielding in Spacecraft|
|Keywords:||Polyethylene, Borated Polyethylene, Radiation Shielding, Thermal Neutrons|
Polyethylene composites are good absorbers of low energy neutrons that
can find applications as structural material inside spacecraft.
Polyethylene and 5% borated polyethylene fabricated using conventional
polymer processing techniques were evaluated for radiation shielding
properties. Count rate variation of thermal neutrons was observed
experimentally by placing sheets of polyethylene and 5% borated
polyethylene of variable thickness in between an Americium-Beryllium
source and He-3 detector and then compared with simulation results
obtained by modelling the experimental setup using Monte Carlo
n-Particle (MCNP) code version 4c. MCNP results verified the
experimental findings that showed 5% borated polyethylene provides much
improved radiation shielding compared to neat polyethylene.